Frederic Ntirenganya
2017-Jan-01 17:27 UTC
[R] Date Column error: 'origin' must be supplied
Thanks. It is helpful! Frederic Ntirenganya Maseno University, African Maths Initiative, Kenya. Mobile:(+254)718492836 Email: fredo at aims.ac.za https://sites.google.com/a/aims.ac.za/fredo/ On Fri, Dec 30, 2016 at 5:58 PM, Achim Zeileis <Achim.Zeileis at uibk.ac.at> wrote:> On Fri, 30 Dec 2016, Frederic Ntirenganya wrote: > > Hi All, >> >> I am creating date column on my data but getting the following error: >> >> #add date column dat1$Date=paste(as.Date(dat1$Year,dat1$Month, >> dat1$Day, sep="-"))Error in as.Date.numeric(origin, ...) : 'origin' >> must be supplied >> > > You first need to paste() the character string and the coerce it with > as.Date() - not the other way around: > > as.Date(paste(dat1$Year, dat1$Month, dat1$Day, sep="-")) > > >> >> I will appreciate any help from you guys. Thanks. >> Here is the data. >> >> >> dput(head(dat1))structure(list(Year = c(1984L, 1984L, 1984L, 1984L, >> 1984L, 1984L >> ), Month = c(1L, 1L, 1L, 1L, 1L, 1L), Day = 1:6, WindSpeed = c(5L, >> 4L, 4L, 3L, 5L, 6L), Sunshine = c(6.3, 4.8, 0.6, 8.2, 7.3, 1.7 >> ), Tmax = c(27.4, 26.3, 22.9, 27.7, 28.5, 25.5), Tmin = c(14.5, >> 16, 14.4, 14.8, 16.6, 15.4), Hmax = c(100L, 95L, 97L, 100L, 97L, >> 99L), Hmin = c(45L, 62L, 72L, 55L, 54L, 63L), Station.Name >> structure(c(1L, >> 1L, 1L, 1L, 1L, 1L), .Label = "KIGALI AERO", class = "factor"), >> Elevation = c(1490L, 1490L, 1490L, 1490L, 1490L, 1490L), >> Longitude = c(30.11, 30.11, 30.11, 30.11, 30.11, 30.11), >> Latitude = c(-1.95, -1.95, -1.95, -1.95, -1.95, -1.95)), .Names >> c("Year", >> "Month", "Day", "WindSpeed", "Sunshine", "Tmax", "Tmin", "Hmax", >> "Hmin", "Station.Name", "Elevation", "Longitude", "Latitude"), >> row.names = c(NA, >> 6L), class = "data.frame") >> >> >> Best Regards, >> >> Fredo >> >> >> Frederic Ntirenganya >> Maseno University, >> African Maths Initiative, >> Kenya. >> Mobile:(+254)718492836 >> Email: fredo at aims.ac.za >> https://sites.google.com/a/aims.ac.za/fredo/ >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posti >> ng-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >>[[alternative HTML version deleted]]